/*
 * Copyright 2012 Claude Houle claude.houle@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.google.code.mochaccino.framework.webstrap.jetty;

import com.google.inject.Provider;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
import org.eclipse.jetty.util.thread.ExecutorThreadPool;
import org.eclipse.jetty.util.thread.ThreadPool;

public final class ThreadPoolProvider implements Provider<ThreadPool> {

	private TimeUnit                keepAliveUnit;
	private int                     corePoolSize;
	private int                     minPoolSize;
	private long                    keepAlive;
	private BlockingQueue<Runnable> queue;

	public ThreadPoolProvider( int minPoolSize, int corePoolSize, long keepAlive, TimeUnit keepAliveUnit, BlockingQueue<Runnable> q ) {
		this.minPoolSize = Math.max( 0, minPoolSize );
		this.corePoolSize = Math.max( 1, corePoolSize );
		this.keepAlive = Math.max( 1, keepAlive );
		this.keepAliveUnit = keepAliveUnit != null ? keepAliveUnit : TimeUnit.MINUTES;
		this.queue = q != null ? q : new LinkedBlockingQueue<Runnable>();
	}

	public ThreadPoolProvider() {
		this( 256, 256, 1, TimeUnit.MINUTES, new LinkedBlockingQueue<Runnable>() );
	}

	@Override
	public ThreadPool get() {
		return new ExecutorThreadPool( minPoolSize, corePoolSize, keepAlive, keepAliveUnit, queue );
	}
}
